fix: Gemfile to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-RUBY-ACTIONMAILER-8220269
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-8220162
- https://snyk.io/vuln/SNYK-RUBY-ACTIONPACK-8220268

Gemfile

@@ -5,7 +5,7 @@ gemspec
 
 group :test do
   gem 'activerecord', '>= 5.2'
-  gem 'actionmailer', '>= 5.2'
+  gem 'actionmailer', '>= 6.1.7.9'
   gem 'bson_ext', '~> 1.3'
   gem 'sqlite3', '~> 1.4'
 
@@ -31,7 +31,7 @@ group :test do
   gem 'factory_bot_rails'
   gem 'database_cleaner', '< 1.1.0'
   gem 'cucumber'
-  gem 'cucumber-rails'
+  gem 'cucumber-rails', '>= 2.1.0'
   gem 'capybara'
   gem 'selenium-webdriver'
   gem 'chromedriver-helper'